In which of the following equilibrium Kc and Kp are not equal?

Question

In which of the following equilibrium Kc and Kp are not equal? (A)  2C(s)+O2 (g) leftharpoons 2CO2(g)  (B)  2NO(g)N2(g) leftharpoons +O2(g)  (C)  SO2(g)+NO2(g) leftharpoons SO3(g)+NO(g)  (D)  H2(g)+l2(g) leftharpoons 2Hl(g)

Tardigrade Admin · Accepted Answer

Kp=Kc(RT)Δ ng Δ ng≠ 0 for the reaction 2C(s)+O2(g)2CO2 Thus, Kp≠ Kc

Q. In which of the following equilibrium $K_{c}$ and $K_{p}$ are not equal?

$2 C (s) + O_{2} (g) ⇌ 2 C O_{2} (g)$

$2 NO (g) N_{2} (g) ⇌ + O_{2} (g)$

$S O_{2} (g) + N O_{2} (g) ⇌ S O_{3} (g) + NO (g)$

$H_{2} (g) + l_{2} (g) ⇌ 2 H l (g)$

$K_{p} = K_{c} (RT)^{Δ n_{g}}$
$Δ n_{g} \neq = 0$
for the reaction
$2 C (s) + O_{2} (g) 2 C O_{2}$
Thus, $K_{p} \neq = K_{c}$

Q. In which of the following equilibrium Kc​ and Kp​ are not equal?

2C(s)+O2​(g)⇌2CO2​(g)

2NO(g)N2​(g)⇌+O2​(g)

SO2​(g)+NO2​(g)⇌SO3​(g)+NO(g)

H2​(g)+l2​(g)⇌2Hl(g)